Not trying to hijack this thread but it should probably be located in the "Amp" discussion.
Yes, the transducer wire Mike, I mean "Ace" is talking about is located inside the Reverb tank. I would be either on the input or output. If you have a DMM you can measure the dc resistance on each of the rca jacks, if you get no reading from either one or both then one of the wires is probably broke off or worse the transducer coil winding itself may be broken or fried.
Wald~Electronics Custom shop is now CLOSED. Sure, you can reach out and if i have the time i might be able to help but absolutely no guarantees! This is a place where i hang out only. My opinions, arguments and information passed is strictly from my point of view, it is in no way intended to be a sales pitch for wald~electronics.